Shaleen, Have you considered using Outlines? John Kanagaraj Oracle Applications DBA DBSoft Inc (W): 408-970-7002
So WHO is the Reason for the Season?! Write me for details! ** The opinions and statements above are entirely my own and not those of my employer or clients ** -----Original Message----- Sent: Monday, December 09, 2002 10:04 AM To: Multiple recipients of list ORACLE-L All, We are using a third party application (Retek Warehouse management) which uses AQ as communication mechanism between processes. The problem we are facing is that the AQ query behind Dequeue is doing a full tablescan on queue table which is causing about 5Billion logical reads/day and is bringing the DB to its knees. Following is the query which I gleaned from tracing the process select /*+ FIRST_ROWS */ qt.rowid, qt.msgid, qt.corrid, qt.priority, qt.delay, qt.expiration, qt.retry_count, qt.exception_qschema, qt.exception_queue, qt.chain_no, qt.local_order_no, qt.enq_time, qt.time_manager_info, qt.state, qt.enq_tid, qt.step_no from PAR3214.GENERICTCP qt where q_name = :1 and state = :2 order by q_name, state, enq_time, step_no, chain_no, local_order_no for update skip locked The procedure call is following DBMS_AQ.DEQUEUE( 'par3214.' || qname, queueopts, msgprops, msg_obj, msgid ); Since this is an internal query, I can not change the HINT ( Itested that removing the hint drops logical reads from 2400 to 3). Any ideas? Thanks Shaleen -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: John Kanagaraj INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
